An unmanned blasted off Thursday from Cape Canaveral with a satellite for the National Reconnaissance Office. No details about the classified satellite were divulged. It's intended for national security.

The Atlas rocket should have flown two weeks ago. But crucial radar-tracking equipment was damaged a day before the planned March 25 liftoff. An electrical short overheated the unit. Because repairs continue, the Air Force used backup radar to monitor Thursday afternoon's launch.

The radar accident also delayed a private SpaceX launch, now targeted for Monday.

SpaceX has a fresh load of supplies for the International Space Station. NASA is using private companies to keep the orbiting lab stocked.

IN PALM BAY, DAN BILLOW, WESH 2 NEWS. INFORMATION BLACKOUT HAS BEEN IMPOSED OVER THE LAUNCH OF AN ATLAS 5 ROCKET AT THE CAPE TODAY. THREE. TWO. WE HAVE IGNITION AND LIFT-OFF OF THE-- THE ROCKET LIFTED OFF RIGHT ON TIME UNDER A CLEAR BLUE SKY. IT'S CARRYING A SATELLITE BUILT BY THE NATION'S SPY SATELLITE AGENCY. THE NATIONAL RECONNAISSANCE OFFICE. IRONICALLY THE ROCKET'S MAIN ENGINE WAS BUILT IN RUSSIA SO A SPY SATELLITE THAT MAY BE SPYING ON THE COUNTRY. FOUR MINUTES AFTER THE LAUNCH